Genesis 39:2

“And the Lord was with Joseph, etc.] Blessing him with his gracious presence, with discoveries of his love, and communion with himself, though destitute of the means of grace and ordinances of worship he enjoyed in his father’s house; favouring him with bodily health, and protecting him from all evils and enemies: and he was a prosperous man; in worldly things, and which was owing to the presence of God with him, and his blessing on him: and he was in the house of his master the Egyptian; he continued there, and did not attempt to make his escape; or his employment lay chiefly, if not altogether, in the house, and herein he was prosperous, and continued to be so as long as he was in it; the…”

“he was in the house of his master--Those slaves who had been war captives were generally sent to labor in the field and subjected to hard treatment under the "stick" of taskmasters. But those who were bought with money were employed in domestic purposes, were kindly treated, and enjoyed as much liberty as the same class does in modern Egypt.”

“- Joseph in Potiphar’s House According to our reckoning, Perez and Zerah were born when Judah was in his twenty-eighth year, and therefore, Joseph in his twenty-fourth. Here, then, we go back seven years to resume the story of Joseph. Genesis 39:1-6 Joseph fares well with his first master. “Potiphar.” This is a racapitulation of the narrative in Genesis 37:0: “The Lord;” the God of covenant is with Joseph. “In the house.” Joseph was a domestic servant. “And his master saw.” The prosperity that attended all Joseph’s doings was so striking as to show that the Lord was with him. “Set him over” - made him overseer of all that was in his house. “The Lord blessed the Mizrite’s house.” He blesses…”

“39:2 God is mentioned for the first time (apart from 38:7-10) since Jacob built his altar in Bethel (35:1-15); his covenant name, “the Lord,” is used for the first time since Jacob left Laban (31:49).”